import json
class Todo:
    id_s = 0
    @classmethod
    def add_id(cls):
        Todo.id_s += 1
        return Todo.id_s
    def __init__(self,title:str='',id:int=0,completed = False):
        self.id = id  if id > 0 else Todo.add_id()
        self.title = title
        self.completed = completed

